/Engine/Source/Runtime/GeometryCore/Public/DynamicMesh/DynamicMeshChangeTracker.h
Standard per-triangle integer attribute change type
typedef [FDynamicMeshTriangleAttributeChange](API\Runtime\GeometryCore\DynamicMesh\FDynamicMeshTriangleAttributeCha-)< int32, 1 > FDynamicMeshTriGroupChange